You recognized some changes which where done in 7.4. Logmode:
7.3 LOG_MODE=SINGLE => 7.4.current LOG_MODE=SINGLE => 7.4.develop LOG_MIRRORED=NO 7.3 LOG_MODE=DUAL => 7.4.current LOG_MODE=DUAL => 7.4.develop LOG_MIRRORED=YES 7.3 LOG_MODE=DEMO => 7.4.current disabled/removed => 7.4.develop LOG_BACKUP=NO (default: YES) In addition 7.4 knows a very risky feature. You can switch off log writing for transactions. But you have to be aware that you commit changes and they are NOT durable because a restart resets the database state to the last savepoint. This is the main difference between switing off log writing and LOG_BACKUP=NO (previously known as logmode=demo). In the last case you can recover to the last commit written to the log. Shutdown: 7.4 does not know the SHUTDOWN QUICK. There is only one shutdown which changes the kernels state to offline. 7.4.current: If during shutdown there are open write transactions these transactions receive a cancel request and are forced to rollback. The shutdown waits until the REQUEST_TIMEOUT is reached and then a savepoint with reason=shutdown is triggered and the kernel becomes offline. 7.4.develop: The kernel writes the savepoint with reason=shutdown and switches to offline immediatly. This behaviour normally makes it obsolete to call db_stop. regards Uwe > -----Original Message----- > From: Watz [mailto:[EMAIL PROTECTED]] > Sent: Mittwoch, 11. Dezember 2002 00:17 > To: [EMAIL PROTECTED] > Subject: Question on 7.4 LOG_MODE > > > Hi, > > I was wondering if the DEMO logmode was removed in SAPDB 7.4. > Instead of SINGLE/DEMO theres now a SINGLE/OFF setting in DBM > GUI, and setting the database to SINGLE/OFF switched off the > log indeed but the old parameter LOG_MODE still stays on > SINGLE and not DEMO like in the previous versions (?). > Is the LOG_MODE parameter not used anymore in 7.4 ? > > And another thing....is just the "Stop" button on the > database shutdown dialog in DBM GUI removed for 7.4 > installations or is the actual db_stop DBM server command > disabled for those ? > Previously the box had something like "shutdown/shutdown > quick/cancel" as far as I remember. > > I migrated an R/3 testdrive installation successfully from > SAPDB 7.3 to 7.4 today (with a new dbadaslib though to > support 7.4), worked just as described in the migration > manual on the sapdb.org site and no issues so far :) > > Watz > > _______________________________________________ > sapdb.general mailing list > [EMAIL PROTECTED] > http://listserv.sap.com/mailman/listinfo/sapdb.general > _______________________________________________ sapdb.general mailing list [EMAIL PROTECTED] http://listserv.sap.com/mailman/listinfo/sapdb.general
